Production of antimonates.



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KOEPP & 00., 0F OESTRICH-ON-THE-RHINE, GEBM Y PRODUCTION OF ANTIMON'ATES.

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To all 'whom it may concern Be it known that I, Pmmrr Erna, a subject of the German, Emperor, and resident of Halberstadt, Germany, have invented certain new-and useful Improvements in the Production of Antimonates, of which the following is a specification.

My invention relates to the production of antimonates and to their utilization in the art of making enamels.

It has been proposed before to produce compounds of antimonic acid and oxids "of the alkaline earths or the like by heating at higher temperatures a combination of the respective base which gives 01f volatile acid at high temperature, withaantimony oxid or compounds yielding antimony oxid, or else by heating toa high temperature oxids of antimony and of therewith in thepresence of such acids as will volatilize during -this treatment and leave behind the metal oxids. However ex periments have shown that this method does not furnish good/ results; the products obtained at the high temperatures employed are more or less discolored and in some cases stony. v I i I havenow ascertained that'very pure antimonates ofwhite color and great volume can be obtained by heating to a high tem-,

perature the oxids of antimony and of the bases to be combined-therewith in the pres- ,{lhe nitrate is completely volatilized during this awe ment; it acts as an oxidizing medium and prevents the particles from compacting into a hard solid body. It also seems to exert grm other favorable effects, which have not been ascertainedbefore. By aid of thi smethod antimonates of all kinds of bases such as the. alkaline earths, aluminium, magnesium, zinc, tin, zirconium, berylliummnd the like can be produced. I I Special advantages are obtained if an excess of themetal oxid isused.' Of course by simultaneously heatin oxids of difi'erent .metals mixtures of antlmonatescan be produced.

The oxids' can be replaced by such compounds as will be conv'ertedduring the treatment mentioned into the oxids, such compounds being for instance the carbonates.

Example '1: mony oxid and magnesium oxid are mixed with a suitable quantity of ammonium n1- Specification of Letters Patent.

the base to be combined glasses,

due any blisters in better and augment om'd to be combine Molecular quantities; of anti-- Patented Ja ie, iota.

Application and m 21, 1915, Serial No. 41,198.

degr. G.

Example 2: parts of antimony oxid, 50 parts of zinc oxid and 25 parts of ammonium nitrate are heatedxto red heat in the ASSIGNOR TO THE FIRM OF RUDOLPH trate, andthe mixture is then heated "to a hlgh temperature, say between 800 and 1000 mufilefurnace, until the vapors-have ceased .to escape. Example 3: 30 parts of' zirconium oxid,

10 parts of mag-- arts of ammo- 70 parts of antimony oxid, nesium carbonate and 25 nium nitrate or 70 parts 0 antimony oxid, 50 parts of tin oxid and 10 parts of clayj'are heated to red beat in the muflie furnace, until the-vapors have ceased to escape.

As shown in the'examples, the components can be heated in dry mixture, or some or all of them may react upon each other in a liquid state. Thus for instance antimony oxid and the metal oxid to be combinedtherewith may be used as solids, while the ammonium nitrate may be used in liquid states The products obtained in all cases are very white colored and non-poisonvoluminous,

great resistanceagainst the ous and show -a action of vaclds.

Experiment .have shown that the antimonates produced after this method, and more especially the antimonates of magnesium and zinc, are excellent media for clouding and in the first line enamels.

I am aware that it has been proposed to use the sodium metantimonate' sold under The said product however easily produces to be combined with the antimonic acid according to Example 2 may be used, or else,

as shown in Example 3, besides the metal d with the antimony oxid a second or even a-thirdmetal oxid may be added. The clouding media thus obtained can be further varied and improved byad ing to them other suitable clouding and covering agents.

antimon'ates obtained,

the name'of Leukonin for clouding (enamels I claim 1. The method of producing metal antimonates which consists mixing an antimony oxid and a metal oxid other than an alkali metal oxid with ammonium nitrate and heating the mixture to volatilize the ammonium nitrate.

2. The method. of producing metal antimonates which consists in mixing a compound yieldlng an antimony oxid and a alkali oxid with ammonium nitrate and heatmg themixture to volatilize the ammonium' nitrate. y Y

5. The method of producing metal antimonates, which consists in mixing an anti-.

mony oxid and a metal oxid other than an alkali metal oxid, said metal oxid being in excess, with ammonium nitrate and heating the mixture to volatilize the ammonium nitrate.

6. The method. of producing. metal anti monates, which consists in mixing a compound y elding an antimony oxid and a metal oxld other than an alkali metal oxid,

said metal oxid being in excess, with ammonium nitrate and heating'the mixture to volatilize the ammonium nitrate.

7. The method of producing metal antimonates, which consists in mixing an antimony oxid and a metal compound'yielding a metal oxid other than an alkali oxid, said metal compound being in excess, with ammo nium nitrate and heating the mixture to volatilize the ammonium nitrate.

8. The method of producing metal antimonates,'which copsists in mixing an antimony compound ylelding an antimony oxid and a metal compound yielding a metal oxid other than an alkali oxid, said metal compound being in excess, with ammonium nitrate and heating the mixture to volatilize the ammonium nitrate.

9. The method of producing metal antimonates, which consists in mixing an antimony oxid and a magnesium oxid with ammonium nitrate and heating the mixture to volatilize the ammonium nitrate. I

10. The method of producing metal 'antimonates, which consists in mixing an antimony oxid and a compound yieldingmagnesium oxid with ammonium nitrate and heating the mixture to volatilize the ammonium nitrate.

11. The method of producing metal antimonates, which consists in mixing an anti- .mony oxid and a magnesium oxid, said magnesium oxid being in excess, withammonium nitrate and heating the mixture to volatilize the ammonium nitrate.

12. The method of producing metal anti- 7 monates, which consists in mixing an antimony oxid with a compound yielding magneslum ox1d,'sa1d magneslum oxid' being 1n excess, with "ammonium nitrate and heating the mixture to volatilize ,the ammonium nitrate. I

13. A metal antimonate suitable for'use as a clouding medium for enamels produced by mixing an antimony oxid and a metal oxid other than an alkali metal oxid with ammonium nitrate and heating the mixture to volatilize the ammonium nitrate, said antimonate being white colored, iion-poisonous and having a great resistance to the action of acids.

14. A metal antimonate suitable for use as a clouding medium for enamels produced by mixing an antimony oxid and a magnesium oxid with ammonium nitrateand heating the PHILIPP EYER.

Witnesses: I

JEAN GRUND, CARL GRUND. 

